Sequence switch apparatus



July 24, 195l w. w. CALHOUN 2,561,686

SEQUENCE SWITCH APPARATUS Filed Sept. 17, 1945 5 Sheets-Sheet 2 Wende/W, Ca//roun INVENTOR- rlG. 2 f5 Y ATTORNEY July 24, 1951 Filed Sept. 17,1945 w. w. CALHOUN SEQUENCE SWITCH APPARATUS 5 Sheets-Sheet 4 ATTORNEYFiled Sept. 1'?, 1945 W. w. CALHOUN SEQUENCE SWITCH APPARATUS 5Sheets-Sheet 5 |255/ I Osc. 11155 ANT. 2

Wende/l VW. Ca/hroun lNVE-NTOD..

ATTORNEY Patented July 24, 1951 lUNITED STATES PATENT OFFICE SEQUENCESWITCH APPARATUS Wendell W. Calhoun, Portland, Oreg.

Application September 17, 1945, Serial N0. 616,793

llClaims. (Cl. 20G- 37) The present invention relates'to sequence switchapparatus and while it is not necessarily limited thereto it isparticularly adaptable for use in controlling reception programs ofradio receivers.

Frequently it is. desirable to provide a motor operated` switchapparatus for controlling the energization of a plurality of electricalcircuits in a predetermined sequence. While various forms of switchingapparatus have .been devised heretofore itis generally not possible to.change 2 operable from the exterior of the housing for adjusting theselector elements.

A more specific object of the present invention is' to provide a new andimproved radio program controller including a plurality of switchesconnected forr effecting the energization of the tuned the sequencewithout disconnecting the appara- 4 tus from the power supply andpartially dismantllng it to obtain access to the selector mechanism.Such apparatus is therefore relatively inflexible and hence adaptablefor use only in specic applications. such as for controlling a radiobroadcast receiver, it is desirable to provide a switch apparatuswhereby a plurality of circuits such as the tuned station selectorcircuits may be closed in a predetermined sequence in order to bring ina predetermined series of programs throughout the day and which programis to be repeated daily. It may be desirable to alter the program fromtime to time, so as to substitute one station for another during aparticular period or to shut off the radio for such periodand thesequence switching apparatus should be capable of such adjustment bysimple manual control without requiring the use of .any tools andwithout requiring any dismantling of apparatus.

It is an object of the present invention, therefore, to provide a newand improved sequence 'switching apparatus so constructed and arrangedwhereby the sequence may be changed at will without the use of tools andwithout requiring dismantling. of the. apparatus.

A further object of the invention is to provide a new and improved motordriven sequence switch apparatus for controlling a plurality ofelectrical circuits in a predetermined timed sequence, the apparatusbeing soy constructed and arranged whereby the sequence may be alteredat will by the manipulation of a knob extending from the front panel ofthe apparatus without requiring disconnectionof the switch apparatusfrom the power supply or from the controlled circuits.

A still further object of the present invention is Vto provide a new andimproved sequence switch apparatus for controlling a plurality ofelectrical circuits, the apparatus .including a plurality of adjustableselector elements adapted to engage withand operate cooperating switchesconnected in the controlled circuits and with manual. means For certainapplications,

broadcast station circuits of the radio receiver in a selectivesequence, the controller being driven by a clockwork mechanism wherebythe radio set is controlled. according to predetermined time intervals.

In accordance with an illustrated embodiment the invention comprises arotatably mounted drum having a plurality of equally radially spacedselector detents adjustably mounted on the periphery of the drum formovement longitudinally of the drum into one of a plurality of axiallyspaced radial planes. A timer motor is provided for notching the drum inone direction of rotation through angles of movement corresponding tothe spacing between the selector elements at predetermined timeintervals. A plurality of switches are arranged adjacent the drum eachhaving a portion extending adjacent the path of travel of the selectordetents arranged in each of said radial planes and adapted to be engagedand operated thereby. A lever mechanism is provided in the apparatus andwhich is operable by a knob mounted on the panel of the apparatus bymeans of which the selector detents may be adjusted at will from one ofthe radial planes to the other to vary the sequence of switch operation.The. switches are each connected for operating a corresponding circuitof the radio receiver tuned to a particular broadcast station wherebyupon rotation of the drum a predetermined program is tuned in. Theconnections to the radio receiver provide for manual operation of thereceiver at any time independently of the operation of the programcontroller mechanism.

For a consideration of what is believed novel and inventive, theattention is directed to the following description taken in connectionwith the accompanying drawings while the features of novelty will bepointed out with greater particularity in the appended claims.

In the drawings Fig. 1 is a front elevation showing the front panel ofthe apparatus constructed in accordance with one form of the presentinvention; Fig. 2 is a front elevation of the apparatus shown in Fig. 1but with the panel removed; Fig. 3 is a cross-sectional View taken alongthe line 3-3 of Fig. 2; Fig. 4 is a fragmentary enlarged detail view,certain portions being broken away, illustrating the motor driven timingmechanism embodied in the invention; Fig. 5 is an enlarged detail viewtaken along the line 5-5 of Fig. 3; Fig. 6 is a cross-sectional viewtaken along line 6-6 of Fig. 5; Fig. is an enlarged cross-sectional viewillustrating one detail of the invention; Fig. 8 is a schematic wiringdiagram illustrating the electrical operating circuit for the switchapparatus shown in Figs. 1 to 4 inclusive; Fig. 9 is a schematic wiringdiagram illustrating one manner in which the selector switches of thecontroller may be connected to a push button operatng mechanism of aradio broadcast receiver; and Fig. 10 is a schematic wiring diagramillustrating a further manner in which the selector switches embodied inthe pres-- ent invention may be connected for controlling the tunedstation selector circuits of a radio broadcast receiver; and Fig. 11 is`an enlarged detail view illustrating a modification of the invention.

Referring now to the drawings, the sequence switch apparatus is includedwithin a housing including opposite side walls I and II, a front panelI2 and a base I3. A drum generally indicated at I is rotatably mountedupon a shaft I6 which in turn is suitably supported between the oppositeside walls I0 and II. The drum is comprised of a pair of opposite enddiscs I8 and I9 between which extend a multiplicity of rectangular bars2| extending parallel with the shaft I6. or lengthwise of the drum.These bars are arranged in a cylindrical configuration concentricallyabout the shaft I6 and are spaced circumferentially apart by equaldistances. A selector element or detent 22 is slidably arranged uponeach of the bars 2|, one of the detents being shown in greater detail inFig. 7. The detents 22 are longitudinally adjustably upon thecorresponding supporting bar 2| into one of a plurality of radialplanes. The detents 22 each comprise a rectangular sleeve portion 23which is freely slidable over the corresponding bar 2| and anoutstanding lug portion 24 having sloping forward surfaces facing in thedirection of rotation of the drum. For facilitating the adjustment ofthe detents into alignment with each other in the radial planes, thebars 2| are each provided on the outer surface with a plurality ofequally spaced apart indentations 25 providing recessed seats for balls26 provided in a cooperating bore formed in the outstanding lug portionof the detent and urged into engagement with the bar 2| by a smallspring 21 arranged therebehind.

A plurality of switches 30 supported upon a bracket 3| are mountedadjacent the forward side of the drum I5 each of the switches having aportion 32 of insulating material extending in the path of travel of thedetents 22 arranged in each of the radial planes indicated by the rowsof indentations 25 on the bars 2|. As illustrated in the view of Fig. 3the switches 3U are of a normally open contact type so that uponengagement of the portion 32 by one of the detents 22 of the drum theswitch contacts are momentarily closed for effecting energization of thecircuit in which the switch is connected. It will be obvious, however,that the switches 30 may be of any desired type depending upon theparticular application of the sequence controller.

The drum I5 is adapted to be notched with a step by step movement in thedirection of rotation indicated by the arrow 34 by an electromagneticactuating device 35. The device 35 as shown in the drawings is of thedirect current type including a solenoid winding and having anon-magnetic sleeve 36 extending therethrough forming a guide for themagnetic armature 31 slidably arranged within the sleeve 36. One end ofthe sleeve is threaded as indicated at 38 and is provided with a slot 39along one side through which extends a pin 40 secured to the member 4Iattached to the armature 31. A pair of stop nuts 42 and 43 are providedupon the threaded sleeve portion 38 by means of which the length oftravel of the armature 31 may be adjusted. The end of the member 4| ispivotally connected to a lever 44 which in turn is pivotally mounted at45 and connected at its opposite end 46 to the pawl 41. The outerlnostend of the pawl 41 engages with the bars 2| of the drum I5 adjacent theend disc I8. In the View of Fig. 3. the detents 22 have been omittedfrom in front of the tip of the pawl 41 for purposes of greater clarity.The armature 31 is biased to the right, as viewed in Fig. 3, by means ofa spring 43 shown connected between the lever 44 and a bracket 49secured to the base of the device 35.

The device 35 is adapted to be energized from a suitable source ofdirect current, and as shown in the drawings, such source is provided inthis instance by a thermionic rectifier indicated at 5I mounted in abase 52 secured to the side wall I0. A wave smoothing capacitor 53 isalso shown mounted adjacent the base 52. The electrical connections forthe operating circuit will be described more fully hereinafter withparticular reference to the wiring diagram of Fig. 8.

The electromagnetic actuating device 35 is adapted to be energized atrecurrent periodic intervals by a timer mechanism whereby upon each suchenergization the pawl 41 will be moved toward the right, as viewed inFig. 3, by such an amount whereby the drum I5 is rotated through anangle of movement corresponding to the radial spacing between theadjacent bars 2| of the drum. Referring particularly to the fragmentaryView of Fig. 4, the timer mechanism comprises an electric clock 55 thehour shaft of the clock being provided with a pinion 56 which isconnected by the gear 51 to a further pinion 5B of the same size aspinion 56. Mounted on the same shaft as the pinion 58 is a cam disc 59having four equally spaced notches in its periphery. Pivotally mountedas at 6I is a lever 62 having a depending portion 63 normally ridingupon the periphery of the disc 59. The lever 62 is normally biaseddownwardly by means of a weight 64 mounted on the outer end thereof andis adapted to engage a switch having an insulating pin 66 extending fromthe upper surface thereof into the path of travel of the end of thelever 62.

Since the cam disc 59 makes one revolution per hour the rider 63 willdrop into one of the notches 60 every fifteen minutes to cause closureof the contacts of the switch 65. The contacts of the switch 65 are heldclosed only for a short period and will be reopened upon raising of thelever 62 away therefrom by the further rotation of the cam disc 59. Thenotches are so provided on the cam disc 59 with relation to the positionof the rider 63 that the dropping of the rider into the notches occurson the even hour, quarter hour, half hour, and three-quarter hour of theclock 55. It is to be understood, however, that this particular timingis selected with regard to the specific application for the describedinvention, that is, as a radio program controller. Since radio broadcastprograms are normally timed for such intervals the selector switches 30are adapted to be actuated at such correspondaser-gione 'ing intervals."remmer `app'Headers-nf thesequence' switch apparatus of the Apresentinventionv zany* other .time interval between "successive closures fofthe 'switch GBmaybe'provided. Moreover,itfi's toV be'un'derstond,y thatitis no'tessential" that .the 'switch 65 "be 'operated by a timing motor`o'flth'e type `described since lit may equally well 'be actuated y"oylany lother r4means such as, Tor example, 'a condition 'responsive"means Whenused 'as a 'radio program controller, 4it .may noltbenecessary or desirable '-to 'makegprovision' for lcontrolling 4the radio`receiver throughout a full twenty-Tourneur period. "Normally, intheaverage home the radio set fis not used' -for certain' periods,for'eXampla `Trom `midnight until `six ann. Thetirnermechanism ofthepresent invention 'includes 'means for "lifting the switch `ioperatinglever J|32 `'to 'an inoperative position during suhiperiods'o'fnon-use-of the radio receiver. This .'means 'includes a fgeari`n'leshedfvvith -a vsmall pinion on the shaft bearing Ethe gear-"51 the`ratio 4offteeth `being such `that *the gear makes `one `revolution "intwenty-f our hours. "Securedto'the 'shaft of the `gear Lli' is iacami@having -a'fraised portion "10 which -"is ladapted `to en- "gage 'with adepnding `rider 1| attached to *the 'lever 62. The `position 4of 4the`raised Mportion '1U of. -the cam "69 is'isuch that the Vlever -62 is"lifted 'thereby during some period, "such as, -frommid- :night to.six"a. -m.` and during which period the lever iZwill be held in aninoperative position vas regards :the VcamSSl land the switch v'65.

"Referring now to lthe Wiring *diagram of lFig. ".8 "the clock 55 isadapted'to vbe vconnected directly across the 4alternating currentsouree'o'f "supply 'indicated "by leads 13. The 4rectiier `tube 5| isAalso connected across `the alternating current supply 13 While thedirect current output of the tube" 5| is connected in -series-relationwith the winding oi the electromagnetic device 35 and 'the switchf`f65.'If an 'alternating current actuating devicebe substituted for thedirect ycurrent electromagnetic device I.35 then,of course, the'rectierf5l 'maybe dispensed with, therectier being employed in thisinstance lmerely as aconvenient-.m'ethod o'f reducing noise.

. In -the present embodiment, VVTthe =bars 12| vpro- Avided on the drumJI'5 `'correspond' in'numberto "Lthefnumber Iof fifteen `rninuteintervals during r`.that-.portion o'f thelday over which the voperation`fof 'the .radio areceiver Sis to Ebeicontrolled. "Ifthe radio. Lis tobe 'controlled at fteen minute -`interival's throughout r'a "twenty-fourhour day 'then "96 bars must be vprovlided,..but if vav'cam lmea'ns suchfasfil, 1.0 arerincorporatedt;inthe timer rfor ren.-

-ier'ative for some periodi-such asi'six hours,` fthenlafcorrespondngly' .fewer inumber of barst 'need Lbe provided 'on the.drum` |15. In any event', the i-'drum yl5 'contains such a inumber'of'bars 'with ..one.detent.on reach so :that `the switches 3U arecontrolled .thereby at .predetermined-'desired intervals overaaipredetemnined period.

.The apparatus of the kpresent inventionfin- .cludes' means "wherebylthe position .of 'the detents :tspring 119 which z-is lprovided 'with:a :hook-shaped itend'extending overa U-.shaped .lever l"83. "The,relever. f83r.extends `transversely: between .the side' vil() `Walls of:the Yhousing parallel with the .rod |32` and :is pivotallyisuppor-tedat Iits l,upperends .as at..8 4. Thedever 83 normally depends- -from its-pointsof pivotal support. lto hold the lower :end of the4lever-:Bllqout .of engagement vof the .detents .ofthe drum. A manualoperating .knob 'is kprovided on the end of a squared -shaft r8'6 whichlshaftfextends :throughthe pulley 81 ythe pulley 8.1being -nonrotatable.relative to the shaft 86. .Extending-aroundethe'pulley 81 is a wireeordwhich is trained around an idler pulley 89 mounted adjacentthaoppositehousingside wallthe lower .en'dof .the wire f88 being connected. asa-at91| to Ithe -sleeve 8L By .rotation of 4the knob 85 the pul-leyf8f1.is-.also rotated :whereby -the sleeve y81 ,is 4carried :longitudinallyupon the rod 82 vand the'lever zmoved across 'the face -of the drum. Asillustrated rmoreclearly lin the views of `1igs..5 ando thelovver end ofIthe rlever `8|) is provided with a pair of pick -up fingers 95 havingsloping vsiderwallsfas:indicated at- 96.

lTofeffect ladjustment of the detents-2v2 lupon the corresponding barsf2l, the operating .knob B5 :is -rst pushed in whereupon the end vof thelshait -86 -bears'fagainst the adjacent endI -98 of thepawl `lever-l|1to `iirst advance the drum -|5 vby one notch. A .collar'fSB on the shaftY86 lengages with the vvU-shaped .lever 83 to swing'it upon its pivot 84ltherebyexerting a force through the spring 1= 9 to urge the pick V.upfingers 95 to- `ward Ithe drum l5. While `holding the knob 'in it .isthen rotated and the vlever 80 is carried .across the .iaceof the drumand as one `of .the

.fingers '95 engage the-detention the .adjacent bar .detent will droprelatively into the space between the pairof fingers 95. Having thuspicked up the detent then :by further rotation yof the `knob :in thedesired direction, and while still pressing-the knob 'inwardly againstthe panel, the detent may be :adjusted into the .desired radial .planeand which may be determined by the indexk plate |100 secured to theupper end of the .lever A80. The :index plate bears a series of broad'-cast station call letters one of which may be read through -an openingIGI in the panel I2 of the lhousing As the -call letters of the desiredstation appear through-the opening |0| vthe vknob 85 is .released:thereby disengaging the ngers 'from .the rzdetent. To adjust the nextsuccessive detent tothe ndesired position the knob 8:5 may again ybepressed inwardly thereby rst rotating the drum through an .angular move-.ment corresponding to the spacing between 3a ipairkofxad'jacent .barsand the procedure outlined above .is zthen repeated.

The disc '|18 at .theileft of the drum, as 'viewed in'Fig f2,..is1markedwith the time intervals representedbyreachbar on the drum and Which-may"be read through anv opening |02 in the `panel 12. *For facilitatingrthe reading of the indicia through the opening 1112, it may lbedesirable Sto "provide these `igures upon `a transparent strip--secu-red -'to the edge of the ydise i8 and `to arrange'asmall lamptherebehind. KASuch rneans, however, are-old-and well known in the vartand have been omitted from the 4drawings in this i instance `for.purposes oi greater clarity in `'the presentation.

4The disc i9 iforming fthe opposite 'end yof the 75 fmay `be desiredduring changing 4of `the positions of the detents on the drum. After allof the detents are properly adjusted to suit, the drum is then rotateduntil the time indicated by clock 55 is read through the opening |02following which setting, the drum will be automatically controlled bythe clock.

The switches 30 controlled by the detents on the drum I5 may beconnected in any suitable manner to a radio receiver for controlling theenergization of corresponding circuits pretuned to different frequenciesof desired boadcast stations. In Fig 9 is illustrated in diagrammaticform one method in which the switch assembly indicated generally at 30may be connected for the control of an ordinary push button type ofreceiver. The receiver in this instance is indicated generally by therectangle H which is provided with a plurality of push buttons HI whichare manually operable for energizing a corresponding circuit pretuned toa corresponding radio broadcast station. Electromagnetic solenoids H2are provided upon the extensions H3 of the push button rods and each ofwhich solenoids are connected in series with one of the switches 30 anda suitable direct current source of supply indicated by the leads H4. Aswitch H5 is provided in one of the leads H4 for disconnecting thesource of power supply for the solenoids H2 thereby rendering theswitches 30 ineffective as during such time when only manual control ofthe receiver is desired. Assuming that the switch H5 is closed then uponclosure of one of the switches 30 and energization of a correspondingsolenoid H2 the push button connected thereto will be pulled in therebyclosing the particular tuned broadcast station circuit. Since the pushbuttons as embodied in the normal radio receiver are of the latched intype the solenoids H2 need -be energized only momentarily. It will beobvious that any other push button IH may immediately thereafter bepushed in manually thereby releasing that button which had been latchedin previously by energization of one of the solenoids H2.

One of the radial rows of detents on the drum I5, such as that on theright-hand side as viewed in Fig. 2, may be selected for controlling theoff button of the receiver- This button is indicated at IIIa in thenormal radio receiver disconnects the radio receiver from the source ofpower supply the radio receiver will not be energized except when one ofthe other push buttons is moved to the closed circuit condition. It willbe understood that if a succession of immediately adjacent detents areadjusted into the same radial plane for successively operating the sameswitch 30 the continuity of the reception of a prolonged program willnot be interrupted at the end of each fifteen minute interval. Repeatedclosures of the same switch 30 will result merely in repeatedenergization of the corresponding solenoid H2 but since the associatedpush button is already actuated to the closed circuit position suchsuccessive energization of the same solenoid will have no effect uponthe continuous operation of the receiver.

In Fig. is illustrated a slightly different method in which the switchassembly mounted adjacent the drum I5 may be connected for controllingdirectly the various tuned circuits of a receiver. Since the oscillatorand antenna coils of the receiver are connected in different circuitsdouble pole switches must be provided in lieu of the single poleswitches as previously described.

The doubled pole switches in this instance are indicated at |20, thepairs of contacts of each switch are connected in series withcorresponding oscillator and antenna coils |22 and |2|, respectively.With a switch arrangement of this type it will be necessary to provideshielding around the different switches and which is indicated in Fig.10 by the dotted lines |24. Manually operable switches |25 and |26 areprovided in the oscillator and antenna circuits, respectively, and whichmay be opened to render ineffective the automatic control of thereceiver and to throw it over onto manual operation.

As distinguished from the switches 30 previously described, the switches|20 must be kept closed throughout the period between the successivestep movements of the controller drum I5. According to the previousmodification, and as illustrated in Fig. 3, the switches 30 are of anormally open contact type and the detents 22 on the drum I5 do notengage with the switches except as the drum is moved through one step.According to the present modification, the contour of either the detentsor of the insulating portions of the switches should be so designed thatthe switches |20 will be held closed by the detents in the stationaryposition of the drum. For example, as illustrated more clearly in thedetailed view of Fig. 11 the detents |30 in this instance may beprovided with a attened outer end as indicated at |3| upon whichflattened end portion the insulating bearing portion |32 of the switch|20 is supported in a closed switch position during the positions ofrest of the drum. It will be obvious that detents of the shapepreviously described may be used by suitable modification of thecooperating insulating bearing portion |32 of the switch structure.

The end switch I20a may be of a normally closed single pole type andconnected for controlling the connection of the source of supplyindicated by leads |35 to the receiver through leads |36. Uponengagement of a detent with the switch I20a the circuit is openedthereby deenergizing the receiver.

In order to facilitate the positioning of the drum I5 after each stepmovement thereof by the electromagnetic actuating device 35 I provide aspring biased `pawl (see Fig. 3) comprising a roller I4| mounted uponthe end of a lever |42 the lever being in turn pivotally mounted uponthe end of a pin |43 and biased into engagement with the bars 2| bymeans of a spring |44. The supporting pin |43 is mounted upon anadjustable bracket |45 and which is secured by suitable screws to theadjacent side wall of the housing. The diameter of the roller |4| issomewhat greater than the spacing between the adjacent bars 2| butextends part-way therebetween to hold the drum I5 in a predeterminedangular position after each successive step movement thereof. At thesame time this pawl arrangement substantially precludes movement of thedrum I5 in the reverse direction which may be undesirable in view of thefact that the detents 22 are provided with a sloping face only on theforward side and if the drum were rotated in the opposite direction thetip of the detents might possibly catch upon the ends of the insulatingportions of the switches 30 or I2 and damage the same. f

It will be obvious to those skilled in the art that many changes andvariations may be made in the apparatus disclosed above but it iscontemplated inthe following claims to cover all such obviousyariationsf andmodincations -falling`Av within the true Aspiritandscopefof the present invention.

What I claimisa;y

1. In `a. program controller including a rotatable drum, a. pluralityof' radially spaced detents mounted on the Surface of said drum saiddetents',` being slidably adjustable. in the Adirection longitudinallyof said drum. into one of al plurality ofV axially-v spacedradialplanes, a plurality of switches arranged. adjacent said drum andeacl'ihavingv a portion lying in a. corresponding oneof said pluralityof planes and. adaptedl to bei engaged by ythedetents vadjusted into.the corresponding radial plane, thev combination comprisingr timecontrolled: actuating means for notching said drum. infone.directionfof. rotation through angles ofv movement corresponding, tothe, radial spacing between said detents, means for selectivelypositioning, said detentsfinto any of said radialpla-nes, andmeansinterconnecting said1actuating.meansl and said last mentioned meanswhereby said drum-may benotched by said lastmentioned means.- 4

2, In a sequence-switch apparatus including a rotatablendrum, aplurality .of radially spaced detentsmounted. onthe surface of saiddrums, said,1 detents being slidablyadjustablein. the directionlongitudinally. ;of` said: drum into one of a` plurality of`axiallypaced radial planes, a plurality ofswitche's arranged adjacentsaid drum and each havinga' portion extending into the pathof traveloftheydetentspositioned ina corresponding` one of saidK radial planes,the combination comprising-afpawl for. engaging saiddrumgandnotchingit-with a step by step movementinone directionof-:rotationthrough angles f movement. corresponding to the radialspacing between said detents,I electromagnetic, means for operatingvsaid pawl, and. manual actuating means movable into cooperativerelation-with said pawl foreiecting notching of said drum independently`ofsaid electromagnetic means.

3).- In asequence. switch apparatusfincluding a housingyadrum-rotatablymounted in said housing, a plurality offradially-spaceddetents mounted on. the surfaceof said drum, said detents being;slidably ,adiustableA in the direction longitudinally-of-,said drum:into oneof a-plurality of axially spaced radialv planea, a plurality ofswitchesl arranged; adjacent of said drum and each having, a. portionextending into, the path of travel of the detentsr adj-ustedinto acorresponding, radial plane, meansy operatively connected to said drumfor actuating said drum in one direction of rotation, the :combina-tion.comprising lever meanshingedly mountedin` said. housing, one end of saidlever means extending, adjacent said drum and adapted to engage, with anadjacent one of said detents,'manu'al control means for saidllever meansextending to the outsideuof said housing, said manual meansl beingoperable for causing saidlever means' to engage with. said oneiof saiddetents and for adjusting said one detentlongitudinally of. said druminto any of said radial-planes, and indicia means secured -to said leverand visible through said housing for indicating the position ofadjustment of said one detent by said lever.

4. In a sequence switch apparatus including a housing, a drum rotatablymounted in said housing, a plurality of radially spaced detents mountedon the surface of said drum, said detents being slidably adjustable inthe direction longitudinally of said drum into one of a plurality ofaxially spaced radial planes, a

aristas@ plurality of switches"A arranged., adjacent. said drum landeach` having7 a .portion extending into theupath of travel of`vthe'detents 'arrangedin/ a corresponding radial plane, actuatingmeans'operativelyconnected to saidfdrum` for advancing said drum inone,. .direction, of',A rotation. through incremental anglesiif..movement` corresponding to the radiaLSpacingq between said detents,the combintion. comprising hinged lever means mounted within said.housing-.and having an end extending, adjacent said drum, and manuallyop'- erableumeans connected. to, saidV lever for shifting said leverint-o engageme'nt with. said detents and Afor selectively. positioningsaid detents into any or.` said radialt planes.

5f. In a sequenceswitch.apparatus includingv a housing, a. drumrotat'ablymounted in said housing.n a lplurality. of radially,spaced`detents mount,- edon the surface of said.. drum, said detents beingslidably., adjustable. in. the direction.longigtudinallyot.saidrdrum.into one of a plurality of axially spacedradial ,planes a. plurality of switches arranged'l adjacent said drumvand each having a portion: extendingfinto. the patri of travel of thedetents positioned in a correspondingoneoi saidgradialplanes, a pawlfor, engaging saiddrumy and notching, itwith astepv by. step movementinr oney direction ot rotation through angles of movementcorrespondingtothe radial spacingy between, ysaid-V.v ,detents, electromagnetic meansfor operatingsaidfpawl. the combination comprising,vm l a rod Y, in. Asaid ,housing extending transverselythereof:'adjacent said drumy levermeans pivotallymounted uponsaid rod, saidlevera beingslid-ablelongitudinallyofv said` rod, means on one endaotsaid leverfor=engag`ing the detent onf said drurngnext adjacent the lever end, a.manual contrgl element, extending on theou-tside of said housing, saidmanualcontrol element A beingr operatively connected to said-.leverwherebyA upon rotation o f.; said` element1 said leyeris causedfrto.move longitudinally upon saidy rod, said element beingA,llcngitudinally 4inox/'able into engage menty witnsaid pawl to `effectmovement of said drum .through one step. andA to4 bring; said leverintogengagemena withvsaid--one detent. i

6 .Lug-sequence; switch apparatus includingl a housing, a drum rotatablymounted in said. housing, a. plurality ofy radially spaced .detents,mountedeorrithefsuriacefof said-drums; said detentsbeing slidablyadjustable-in the direction.k longitudinally of said-.- drum'l intoone,v of a .plurality of i axiallyspaeed rradial planes, a plurality ofswitches arranged adjacentsaid.V drum and each havingaHportien-:extendingintol the pathof travel `oigthe detents,positionedina correspondingone oiiwsaid'gradial:planes, a pawl forv engaging saidfdrumrand1= notchingit with a step by step movement inone.V direction.ofv rotation. through a'ng'lespf. movementcorresponding to the radialspacing` between said. detents electromagnetic meansoior operating;saidi pawl, the combination comprising a lever 4pivota-l'ly vmounted insaid housing.` andI having; means ,thereon `for operatively.l .engagingthe:l adjacent; one of; said` detents .en said drum, means extendingoutside of said housing for operating said lever to effect adjustment ofsaid detent to any of said radial planes, said last mentioned meansbeing operatively connected to said pawl for effecting advancement ofsaid drum by one step simultaneously with the operation of said lever.

'7. In a controller including a rotatable drum, said drum including aplurality of straight parallel bars arranged in a uniformly spaced apartrelation and in a cylindrical configuration, a detent slidablyadjustable on each of said bars, means for adjusting said detents intoone of a plurality of axially spaced radial planes, a plurality ofswitches arranged in a side by side relation adjacent said drum and eachhaving a portion extending in a corresponding one of said plurality ofplanes, said switch portions being `adapted to be engaged by the detentsadjusted into the corresponding plane, a timing motor, a

:time switch periodically operated by said motor,

an electromagnetic actuating means connected for periodic energizationthrough said time switch, the combination comprising lever meanspivotally connected to said electromagnetic means operatively engagingsaid drum for shifting said drum through an angle of rotationcorresponding to the spacing between adjacent bars thereof, manuallyoperable means for engaging said detents one at a time for effectingadjustment thereof upon said bars, said manually operable meansincluding a portion for engaging with said lever to effect advancementof said drum one step prior to engagement with a detent on said drum.

8. In a radio program controller including a radio receiver, a rotatabledrum, a plurality of radially spaced detents mounted on said drum, saiddetents being adjustable in the direction longitudinally of said drumand into one of a plurality of axially spaced radial planes, a pluralityof radio station selector switches connected to said receiver arrangedadjacent said drum and each having a portion extending into the path oftravel of the detents arranged in a corresponding one of said radialplanes, an electromagnetic actuating device for notching said drum inone direction by steps through angles of movement corresponding to theradial spacing of said detents, a clock, means controlled by said clockfor effecting energization of said device at predetermined spacedintervals of time, the combination comprising lever means slidablymounted for movement longitudinally of the drum and including means forengaging one of said detents positioned next adjacent thereto, means formanually controlling said lever for effecting adjustment of said onedetent into any of said radial planes, and station indicia means carriedby said lever for indicating the position of said one detent upon saiddrum.

9. In a program controller including a rotatable drum having a pluralityof switch actuating elements arranged thereupon adapted to be adjustedselectively into axially spaced radial planes and a plurality of alignedswitches each having a portion extending in a corresponding one of saidplanes and adapted to be engaged by the elements adjusted into thecorresponding radial plane, the invention comprising a rotatable drumconsisting of a plurality of straight, parallel bars arranged in acylindrical configuration, the opposite ends of said bars beingsupported by a pair of spaced apart disks, a sleeve slidably mounted oneach of said bars for movement longitudinally thereupon, each of saidsleeves including a detent portion extending outwardly of said drum anddefining a switch actuating element.

l0. In a program controller including a rotatably mounted drum havingswitch actuating elements mounted thereupon for selective adjustmentinto a plurality of axially spaced radial planes and a plurality ofaligned switches each having a portion extending in a corresponding oneof said radial planes and adapted to be engaged by actuating elementsadjusted into the corresponding radial plane, the combination comprisinga plurality of parallel bars of angular cross-sectional shape arrangedin an equally spaced relation in a cylindrical configuration, a sleeveslidably mounted on each of said bars and adjustable thereon into one ofa plurality of axially spaced radial planes, each of said sleevesincluding a detent portion extending outwardly therefrom and defining aswitch actuating element, a plurality of spaced notches on each of saidbars and cooperating spring biased means on each of said detents forfacilitating the alignment of said detents in said radial planes andmanually operable means arranged adjacent said drum for engaging one ofsaid detents at a time for adjusting the position of said detents withrespect to said radial planes.

11. In a sequence switch apparatus including a rotatable drum having aplurality of switch actuating elements arranged thereupon for adjustmentinto one or more of a plurality of axially spaced radial planes and aplurality of switches arranged adjacent said drum each having a portionextending into the path of travel of the actuating elements positionedin a corresponding one of said radial planes, the invention comprisingthe combination of a pair of opposite end disks, a plurality ofrectangular bars extending between said disks in a parallel relation andin a cylindrical configuration defining a drum, said bars beinguniformly spaced apart, a rectangular sleeve slidably mounted upon eachof said bars, each of said sleeves including a detent portion extendingoutwardly of said drum and delining a switch actuating element, aplurality of recesses in the outer surfaces of said bars, said recessesbeing aligned in a plurality of radial planes, a spring biased elementarranged within each of said detent portions for cooperatively seatingin said recesses for releasably securing said sleeves in said radialplanes.

WENDELL W. CALHOUN.

REFERENCES CITED The following references areof record in the le of thispatent:

UNITED STATES PATENTS Number Name Date 1,726,520 Kramer Aug. 27, 19292,010,044 Temple Aug. 6, 1935 2,019,157 Rice Oct. 29, 1935 2,045,251Raber June 23, 1936 2,096,072 Spagnola Oct. 19, 1937

